Bug 1679975 (CVE-2019-8955)

Summary:	CVE-2019-8955 tor: memory exhaustion in the KIST cell scheduler resulting in denial of service
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	lewk, mh, pwouters, rh-bugzilla, s
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	tor 0.3.5.8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:48:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1679976, 1679977
Bug Blocks:

Description Dhananjay Arunesh 2019-02-22 11:49:27 UTC

In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.

References:
https://blog.torproject.org/new-releases-tor-0402-alpha-0358-03411-and-03312 
https://trac.torproject.org/projects/tor/ticket/29168

Comment 1 Dhananjay Arunesh 2019-02-22 11:55:21 UTC

Created tor tracking bugs for this issue:

Affects: fedora-all [bug 1679976]

Comment 2 Dhananjay Arunesh 2019-02-22 11:55:42 UTC

Created tor tracking bugs for this issue:

Affects: epel-7 [bug 1679977]

Comment 3 Product Security DevOps Team 2019-06-10 10:48:45 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.